On Fri, Oct 26, 2012 at 02:57:50PM -0500, Rob Herring wrote:

Like I said previously, I think we first need guidelines on what is and
isn't acceptable use of C preprocessor in dts files.

Didn't we already say that it was just the same rules as for things tht
get included in .S files?  Besides for plain .dts files (as opposed to
.dtsi files) it seems like if people break things they get to keep all
the pieces without disrupting other people too much.